Circuit interrupter



Oct. 9, 1928. 1,686,629

1:. c. MULVIHILL DEVICEFOR REMOVING SAND FROM METAL CASTINGS F iled Jan. 19, 1925 in 7/921 601': )anzZ CT/(wZmf/ZIZZ Patented Oct. 9, 1928.

UNITED STATES ATENT OFFICE.

DANIEL C. MULVIHILL, F EANNIBAL, MISSOURI.

DEVICE FOR REMOVING SAND FROM METAL CASTINGS.

Application filed January 19, 1925. Serial No. 3,347.

This invention relates to devices for loosen for pern'iitting the loosened sand of the core ing and removing sand and sand cores from to run out through the holes 9. Any suitable castings, and the principal object of the insupport may be employed, or none at all, as vention is the provision of new and improved occasion, necessity or convenience may resand core loosening and sand removing device quire. 5 that may be inserted through holes in cast- In the torn: ot' the device selected to illusings for loosening the sand or sand cores in trateone embodiment of the invention, a shaft recesses formed by the cores in the casting 16, which is preferably the conventional type operation whereby the same may be poured ot tlexible shaft, is adapted to be rotated by 0 from the cast article. suitable means, such as the motor 17. The on Another object of the invention is the proflexible shaft 16 is provided with a lleriible vision of new and improved means tor reprotecting sheath or casing 18, as is usual in moving sand from the interior of cast wheels, such constructions. The motor 17 may be that is flexible, that may be readily inserted of any suitable shape or type.

5 in the recess containing the core, that simple The oute end of the flexible shatt 16 is pro- 65 in construction, cheap to manufacture, easily vided with a chuck 1i) comprising the clampmanipulated, readily assembled, ellicient in ing jaws 20 and the chuck sleeve 21 for opoperation, and that is not likely to become crating the jaws. broken or get out of order. A flexible tool 22 is adapted to have one end 0 Other and further objects and advantages secured to the shaft 16 by the clamping jaws 7tl of the invention will appear from the follow- 20 in the usual manner. he tool 22 may ing description taken in connection with the be of any suitable mate "ial. It has been found accompanying drawings, in which by experiment that a, length of wire cable Fig. 1 is a side elevation of a car wheel constitutes an excellent tool for this purpose.

25 showing the invention associated therewith; It is cheap and at the same time exceedingly and efllcient.

Fig. 2 is a vertical section on line 2-2 of 11 desired the sheath or casing 18 may be Fi 1 provided ith a handle 23 adjacent to the In casting ear wheels of the double plate head 19 for manipulating the tool. A switch 30 center type an annular recess is formed about 25 tor controlling the motor may be mountthe hub, and after the casting operation the ed on the handle 23. sand core is removed. Herctot'ore this has In the operation of the device, the tool is been done at considerable time and expense. inserted in holes 9 in the side of the wheel and \Vith the present invention the operation of the rotation of the tool will readily loosen removing the sand core is accomplished with the sand which will run out of the recess ease and dexterity. through the openings. By inserting the tool On the drawing the reference character 10 in two or more of the openings the sand may designates a car wheel which has been cast be loosened and detached from all portions with an annular recess 11 about the hub 12, of the walls of the recess, with ease and with a plurality of openings 9 leading therecelerity. trom. as usual in such constructions. the re- It is thought from the foregoing taken in cess being formed by the sand core 13. The connection with the accompanying drawings wheel is shown as being supported on a track that the construction and operation of my l l, and guided thereon by a guide 15. It is device will be apparent to those skilled in the 45 understood that the track and guide are used art, and that various changes in size, shape, 5 for convenience in transporting the wheel proportion and details of construction maybe from one position to another, and are not abma do without departing from the spirit and solutely necessary to the operation ot the scope of the appended claim. sand loosening device, although they will Iclaim as my invention: 54 hold, the wheel in an advantageous position A device for loosenine" .and, cores in 1101- g low metal castings, comprising a flexible shaft, means for operating said shaft, a long flexible tool formed from a single length of twisted Wires, a head on the end of said shaft 5 for securing the end of said tool thereto, whereby said tool may be inserted through a core hole in a casting With the head on the outside of said casting, for loosening said core and reducing the same to loose sand, and a handle member on said shaft adjacent to 10 said head.

In testimony whereof I aflix my signature.

DANIEL C. MULVIHILL. 

